Surround in Apple Music (not Atmos) - how to find it?

[MartinGr]

I didn't even know it exists - but when I looked after Return to Forever's last album , my iPhone showed me "Dolby Audio" as the format, not Atmos. And my Apple TV streamed the Quad mix, as released by Dutton Vocalion. It even says "lossless".
Are there more titles like this? And how to find them?
Thanks
Martin

 

[sjcorne]

https://www.quadraphonicquad.com/fo...ming-on-apple-music-in-5-1-dolby-audio.31315/